Question

COS (A + B) is equal to:-
A
COS A. sin B + sin A cos B
B
COS A. sin B - sin A. COS B
C
COS A. Cos Bf sin A. sin B
D
COS A. COS B-sin A. sin B​

Answer 1

Step-by-step explanation:

Option no.(D)

= CosA.CosB - SinA.SinB